Robert Jacobson, PhD (Former Employee)
Science and Products
Filter Total Items: 14
Southeast Regional Assessment Project (SERAP): Assessing Global Change Impacts on Natural and Human Systems in the Southeast
The Southeastern United States spans a broad range of physiographic settings and maintains exceptionally high levels of faunal diversity. Unfortunately, many of these ecosystems are increasingly under threat due to rapid human development, and management agencies are increasingly aware of the potential effects that climate change will have on these ecosystems. Natural resource managers...
USGS-USFS Partnership to Help Managers Evaluate Conservation Strategies for Aquatic Ecosystems Based on Future Climate Projections
The Southeastern U.S. spans broad ranges of physiographic settings and contains a wide variety of aquatic systems that provide habitat for hundreds of endemic aquatic species that pose interesting challenges and opportunities for managers of aquatic resources, particularly in the face of climate change. For example, the Southeast contains the southernmost populations of the eastern brook...
Filter Total Items: 142
Hydraulics of freshwater mussel habitat in select reaches of the Big River, Missouri Hydraulics of freshwater mussel habitat in select reaches of the Big River, Missouri
The Big River is a tributary to the Meramec River in south-central Missouri. It drains an area that has been historically one of the largest lead producers in the world, and associated mine wastes have contaminated sediments in much of the river corridor. This study investigated hydraulic conditions in four study reaches to evaluate the potential contribution of physical habitat dynamics...
Authors
Maura O. Roberts, Robert B. Jacobson, Susannah O. Erwin
Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river
Understanding dispersion in rivers is critical for numerous applications, such as characterizing larval drift for endangered fish species and responding to spills of hazardous materials. Injecting a visible dye into the river can yield insight on dispersion processes, but conventional field instrumentation yields limited data on variations in dye concentration over time at a few, fixed...
Authors
Carl J. Legleiter, Brandon James Sansom, R. B. Jacobson
Common ground: Flood-risk reduction and conservation in large-river floodplains in Missouri Common ground: Flood-risk reduction and conservation in large-river floodplains in Missouri
No abstract available.
Authors
Robert B. Jacobson
Stream classification and gravel-bar inventory for Buffalo National River and Ozark National Scenic Riverways Stream classification and gravel-bar inventory for Buffalo National River and Ozark National Scenic Riverways
The data summarized in this report provide a baseline characterization of the physical attributes of the riverine ecosystems in two landscapes managed by the National Park Service—Ozark National Scenic Riverways, Missouri, and Buffalo National River, Arkansas—to inform understanding and management of aquatic habitat. The study utilized a basin-scale approach and consisted of two...
Authors
Susannah O. Erwin, Robert B. Jacobson, Jabari C. Jones
Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs
The imperiled pallid sturgeon (Scaphirhynchus albus) and closely related, but more common, shovelnose sturgeon (S. platorynchus) are believed to broadcast adhesive, demersal eggs in the current and over coarse substrate in turbid rivers of the North American midcontinent. It has been hypothesized that eggs settle immediately following fertilization, but field conditions preclude direct...
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Characterization of pallid sturgeon (Scaphirhynchus albus) spawning habitat in the Lower Missouri River Characterization of pallid sturgeon (Scaphirhynchus albus) spawning habitat in the Lower Missouri River
Acipenseriformes (sturgeons and paddlefish) globally have declined throughout their range due to river fragmentation, habitat loss, overfishing, and degradation of water quality. In North America, pallid sturgeon (Scaphirhynchus albus) populations have experienced poor to no recruitment, or substantial levels of hybridization with the closely related shovelnose sturgeon (S. platorynchus)...
Authors
Caroline M. Elliott, Aaron J. Delonay, Kimberly Chojnacki, Robert B. Jacobson
Non-USGS Publications**
Jacobson, R. B., 1986, Genesis and distribution of colluvium, Buffalo Creek Area, Marion County, West Virginia: Transportation Research Record, Transportation Research Board, v. 1089, p. 63-67.
Jacobson, R. B., and Coleman, D.J., 1986, Stratigraphy and recent evolution of Maryland Piedmont flood plains: American Journal of Science, v. 286, p. 617-637
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 14
Southeast Regional Assessment Project (SERAP): Assessing Global Change Impacts on Natural and Human Systems in the Southeast
The Southeastern United States spans a broad range of physiographic settings and maintains exceptionally high levels of faunal diversity. Unfortunately, many of these ecosystems are increasingly under threat due to rapid human development, and management agencies are increasingly aware of the potential effects that climate change will have on these ecosystems. Natural resource managers...
USGS-USFS Partnership to Help Managers Evaluate Conservation Strategies for Aquatic Ecosystems Based on Future Climate Projections
The Southeastern U.S. spans broad ranges of physiographic settings and contains a wide variety of aquatic systems that provide habitat for hundreds of endemic aquatic species that pose interesting challenges and opportunities for managers of aquatic resources, particularly in the face of climate change. For example, the Southeast contains the southernmost populations of the eastern brook...
Filter Total Items: 142
Hydraulics of freshwater mussel habitat in select reaches of the Big River, Missouri Hydraulics of freshwater mussel habitat in select reaches of the Big River, Missouri
The Big River is a tributary to the Meramec River in south-central Missouri. It drains an area that has been historically one of the largest lead producers in the world, and associated mine wastes have contaminated sediments in much of the river corridor. This study investigated hydraulic conditions in four study reaches to evaluate the potential contribution of physical habitat dynamics...
Authors
Maura O. Roberts, Robert B. Jacobson, Susannah O. Erwin
Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river
Understanding dispersion in rivers is critical for numerous applications, such as characterizing larval drift for endangered fish species and responding to spills of hazardous materials. Injecting a visible dye into the river can yield insight on dispersion processes, but conventional field instrumentation yields limited data on variations in dye concentration over time at a few, fixed...
Authors
Carl J. Legleiter, Brandon James Sansom, R. B. Jacobson
Common ground: Flood-risk reduction and conservation in large-river floodplains in Missouri Common ground: Flood-risk reduction and conservation in large-river floodplains in Missouri
No abstract available.
Authors
Robert B. Jacobson
Stream classification and gravel-bar inventory for Buffalo National River and Ozark National Scenic Riverways Stream classification and gravel-bar inventory for Buffalo National River and Ozark National Scenic Riverways
The data summarized in this report provide a baseline characterization of the physical attributes of the riverine ecosystems in two landscapes managed by the National Park Service—Ozark National Scenic Riverways, Missouri, and Buffalo National River, Arkansas—to inform understanding and management of aquatic habitat. The study utilized a basin-scale approach and consisted of two...
Authors
Susannah O. Erwin, Robert B. Jacobson, Jabari C. Jones
Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs Physical characteristics and simulated transport of pallid sturgeon and shovelnose sturgeon eggs
The imperiled pallid sturgeon (Scaphirhynchus albus) and closely related, but more common, shovelnose sturgeon (S. platorynchus) are believed to broadcast adhesive, demersal eggs in the current and over coarse substrate in turbid rivers of the North American midcontinent. It has been hypothesized that eggs settle immediately following fertilization, but field conditions preclude direct...
Authors
Kimberly Chojnacki, Susannah O. Erwin, Amy E. George, James Candrl, Robert B. Jacobson, Aaron J. Delonay
Characterization of pallid sturgeon (Scaphirhynchus albus) spawning habitat in the Lower Missouri River Characterization of pallid sturgeon (Scaphirhynchus albus) spawning habitat in the Lower Missouri River
Acipenseriformes (sturgeons and paddlefish) globally have declined throughout their range due to river fragmentation, habitat loss, overfishing, and degradation of water quality. In North America, pallid sturgeon (Scaphirhynchus albus) populations have experienced poor to no recruitment, or substantial levels of hybridization with the closely related shovelnose sturgeon (S. platorynchus)...
Authors
Caroline M. Elliott, Aaron J. Delonay, Kimberly Chojnacki, Robert B. Jacobson
Non-USGS Publications**
Jacobson, R. B., 1986, Genesis and distribution of colluvium, Buffalo Creek Area, Marion County, West Virginia: Transportation Research Record, Transportation Research Board, v. 1089, p. 63-67.
Jacobson, R. B., and Coleman, D.J., 1986, Stratigraphy and recent evolution of Maryland Piedmont flood plains: American Journal of Science, v. 286, p. 617-637
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.